In May, Apple released the XServe at a special release event. At that same event, they detailed a companion RAID product in a 3U enclosure. Originally slated for release by end of calender year, it appears the unit will be delayed until early 2003... according to Apple:
Weve received an overwhelming thumbs up on our Xserve 1U rack-mount server from customers and reviewers since it started shipping in July and now were working hard to deliver Xserves companion RAID product in early 2003, not by the end of calendar 2002 as originally announced.